Williamson County, Texas: power grid and siting data
Williamson County is in ERCOT's LCRA load zone. It has 33 mapped substations, owned mostly by Oncor, LCRA and Pedernales Electric Cooperative; the highest voltage is 345 kV. The ERCOT queue lists 1 generation project (1 gas) and 0 battery storage projects here.
Substations in Williamson County
2 at 345 kV, 27 at 138 kV, 4 at 69 kV and below. The 30 highest-voltage stations are listed; the map shows all 33.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Hutto Switching Station | 345 kV | Oncor | 9 | map |
| Round Rock Northeast | 345 kV | Oncor | 4 | map |
| Gabriel | 138 kV | LCRA | 6 | map |
| Round Rock | 138 kV | Oncor | 5 | map |
| Andice | 138 kV | Pedernales Electric Cooperative | 4 | map |
| Round Rock South | 138 kV | Oncor | 3 | map |
| Buttercup | 138 kV | Pedernales Electric Cooperative | 3 | map |
| Jollyville | 138 kV | Austin Energy | 3 | map |
| Rivery | 138 kV | LCRA | 3 | map |
| Seward Junction | 138 kV | Pedernales Electric Cooperative | 3 | map |
| Leander | 138 kV | LCRA | 3 | map |
| Sonterra | 138 kV | Brazos | 2 | map |
| Jarrell East | 138 kV | Oncor | 2 | map |
| Glasscock | 138 kV | LCRA | 2 | map |
| Balcones | 138 kV | Pedernales Electric Cooperative | 2 | map |
| Georgetown | 138 kV | LCRA | 2 | map |
| Jarrell | 138 kV | Oncor | 2 | map |
| Round Rock Southeast | 138 kV | Oncor | 2 | map |
| Georgetown East | 138 kV | LCRA | 2 | map |
| Chief Brady | 138 kV | LCRA | 2 | map |
| Taylor West | 138 kV | Oncor | 2 | map |
| Whitestone | 138 kV | Pedernales Electric Cooperative | 2 | map |
| Kent | 138 kV | Pedernales Electric Cooperative | 2 | map |
| Bartlett | 138 kV | Oncor | 2 | map |
| Blockhouse | 138 kV | Pedernales Electric Cooperative | 2 | map |
| Avery Ranch | 138 kV | LCRA | 2 | map |
| Round Rock Westinghouse | 138 kV | Oncor | 2 | map |
| Georgetown South | 138 kV | LCRA | 2 | map |
| Northwest | 138 kV | Austin Energy | 2 | map |
| Elgin Switching | 69 kV | Oncor | 6 | map |
ERCOT interconnection queue
1 generation project is queued in Williamson County: 1 gas. By stage: 1 in full interconnection study. No battery storage projects are queued.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
16 planned grid projects touch Williamson County: 10 new substations, 4 new or rebuilt lines and 2 substation upgrades, 8 at 345 kV or above; 2 already energized.
Wholesale power prices
The LCRA load zone averaged $44.89/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: SLCN_ESS_ALL $44.49, NF_BRP_RN $44.57 and RVRVLYS_ALL $46.11.
ERCOT day-ahead settlement point prices. Hourly history, battery spreads and real-time prices are on the map.
Data centers and large loads
14 announced data center campuses in Williamson County, 5 at or above ERCOT's 75 MW large load threshold.
- "We Can't Drink Data": Taylor Annexes a Gas-Fired Campus, and the PUC Sues to Keep the Counties Secret The Grid Report 2026-10-09
- Skybox and Prologis file plans for fourth data center in Hutto Baxtel 2026-10-03
- $161 a Kilowatt-Month in Tulsa, 333 Watts a Foot in Dowagiac: The Middle Market Prices Live Power Edge Cases 2026-09-08
- Project Mustang, PowerHouse + Big Watt (City of Taylor) City of Taylor 2026-09-03
- As data centers boom, Taylor sued by residents over proposed ban Austin American-Statesman 2026-07-20
Jurisdiction
Nearest city to the county center: Georgetown (0.3 mi). Outside city limits and ETJ, development falls under county rules and state law. City limits and estimated ETJ are on the map.
Nearby counties
See Williamson County on the map
Every substation, line, queue project, pipeline and price node in Texas, plus Dub, an AI landman who answers questions about any spot. Free account, no card.
Sources: HIFLD and OpenStreetMap substations and lines, ERCOT GIS report (queue, 2026-09), ERCOT day-ahead prices, TxDOT and StratMap boundaries, Barrio Energy research. Updated 2026-11-09. Screening data only; the serving utility confirms capacity.